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2018 Global Restructuring Program Restructuring Reserve [Roll Forward] (Details) - 2018 Global Restructuring Program - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve        
Restructuring liabilities - January 1 $ 93 $ 132    
Charges for workforce reductions and other cash exit costs     $ 302,000 $ 325,000
Cash payments (235) (249)    
Currency and other (2) 0    
Restructuring liabilities - December 31 78 93 $ 132  
Workforce reductions and other cash exit costs        
Restructuring Cost and Reserve        
Charges for workforce reductions and other cash exit costs $ 222 $ 210